Beam Management in Power Saving State for 5G Client Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G-NR beam management systems do not effectively consider beam level mobility in RRC_INACTIVE states, leading to inefficiencies in energy consumption and wake-up signalling reachability.
Innovation Solution
Implementing a method for managing beams in power saving states by configuring serving beams for client devices in RRC_INACTIVE or RRC_IDLE states, allowing for beam reconfiguration upon detection of failures, and using inactive radio network temporary identifiers (I-RNTI) for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If beam management is not implemented in power saving state, then energy consumption is reduced, but wake-up signalling reachability deteriorates
Solution Approach 1:
The patent extracts beam management functionality specifically for power saving state, separating it from full beam management in connected state. The network access node determines a subset of beams relevant for paging the client device in power saving state, rather than managing all beams, thus reducing energy consumption while maintaining necessary reachability.
Solution Approach 2:
The patent applies local quality by configuring beam-specific parameters (such as spatial filters, beam directions, and power settings) only for the subset of beams that are relevant for paging the client device in power saving state. This localized configuration optimizes energy efficiency while ensuring reliable wake-up signalling delivery to the specific client device.
2Reliability
If all beams are monitored in power saving state, then beam failure detection is improved, but energy consumption increases
Solution Approach 1:
The patent extracts only the necessary beam monitoring functionality for power saving state. The network access node identifies and configures a specific subset of beams that are relevant for paging the client device, rather than monitoring all beams. This selective approach maintains adequate beam failure detection capability while significantly reducing the energy consumption associated with comprehensive beam monitoring.
3Reliability
If beam reconfiguration is performed frequently, then communication reliability is improved, but radio resource wastage increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam parameters (including spatial filters, beam directions, and power settings) for the subset of beams relevant to the client device in power saving state. This preliminary configuration enables the network to quickly and efficiently reconfigure beams when needed without extensive resource expenditure, as the basic beam structure is already established.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
85840792PCT01 24 ABSTRACT The invention relates to beam management for a client device (100) in a power saving state. When the client device (100) is in the power saving state, the client device (100) monitors serving beams of a network access node (300) based on a serving beam configuration. The serving beam configuration indicated the serving beams to be monitored by the client device 5 (100) in the power saving state. If the client device (100) detects a beam failure during the serving beam monitoring in the power saving state, the client device (100) performs a beam reconfiguration procedure. The beam reconfiguration procedure informs the network access node (300) about the change in serving beam status and allows the network access node (300) to update the serving beam configuration. Thereby, the network access node (300) has 10 updated information about the serving beams and can reach the client device (100) although the client device (100) is in a power saving state. Furthermore, the invention also relates to the network access node (300), corresponding methods, and a computer program. (Fig. 5) 15